[stomachmonkey]

Couple of things to consider here.

Kindles are designed primarily as ebook readers and really excel at the task. They will render text that is easier to read under a greater variety of conditions and will result in less eyestrain during extended use than a tablet will.

Not everything available to stream from Amazon is also available as a download so maybe spot check your current wish list.

Also remember that unless you've got a place to dump downloaded movies you'll be using up drive space on the tablet.

An alternate to going for a high end tablet with HDMI would be a chromecast and a wireless router. You don't need internet to make use of WIFI. Get a router that will support DLNA broadcasting and a USB hard drive.

You can load all your movies onto the hard drive and stream from there.